Finding the Fourth Proportional to 1,039.61, 1,560.15 and 650.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.61 : 1,560.15 = 650.18 : x
2. Step 2: Convert to fraction form
   1,039.61/1,560.15 = 650.18/x
3. Step 3: Cross multiply
   1,039.61x = 1,560.15 × 650.18
4. Step 4: Simplify right side
   1,039.61x = 1,014,370.53
5. Step 5: Solve for x
   x = 1,014,370.53/1,039.61
6. Step 6: Final answer
   x = 975.73